UKCCSRC - Carbon Capture & Storage (CCS) CO2 ionic trapping at meta-sedimentary aquifer, following a CO2 injection push-pull test

In order to study CO₂-water-rock reactions relative to effectiveness of CO₂ geological storage, small-scale CO₂ injection experiments were performed, as single well push-pull tests, at the Lamont Doherty Earth Observatory test well site (New-York, USA). The injection interval was located at the contact zone between the chilled dolerite and the underlying metamorphosed sedimentary rocks. The variations of post-injection chemical and isotopic characteristics of retrieved water samples (major ions, DIC, 13CDIC) underline the CO₂ reactivity in the aquifer and allow to identify reactions of the dissolved CO₂ with the surrounding rocks, mainly the dissolution of carbonate minerals and complementary cation exchange.

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The UK Carbon Capture and Storage Research Community (UKCCSRC) is supported by the Engineering and Physical Sciences Research Council (EPSRC) as part of the UK Research and Innovation (UKRI) Energy Programme.